―Have you finished your composition already?
―Yes. I _________ it in twenty minutes.
A. have finished B. finished
C. will finish D. had finished
―Have you finished your composition already?
―Yes. I _________ it in twenty minutes.
A. have finished B. finished
C. will finish D. had finished
B
由答句中的Yes可知in twenty minutes不是表示20分钟后的将来，而是表示在20分钟之内。因为是陈述过去的某个事实，故用一般过去时。